Normal
File Deletion is NOT secure.Deleting
files merely removes the file system's pointer to the file, ALL THE DATA
REMAINS ON YOUR HARD DRIVE. Data recovery or forensic software can easily
recover the files you delete. Your sensitive files may also be vulnerable to
advanced recovery techniques, EVEN WHEN OVERWRITTEN, by analyzing
latent magnetic traces.

Covering Your TracksYour browser
keeps extensive logs of online activity on your hard drive. Click on this
link to learn how to clean up those tracks. Don't just delete those files!
Instead, truly erase, overwrite and purge your Internet history.